Thin Lenses The object is placed 150 cm in front of a diverging lens with a foca

Question

Thin Lenses

The object is placed 150 cm in front of a diverging lens with a focal length of -75 cm. A converging lens of focal length 75 cm is placed 50 cm behind the diverging lens.

a) Determine the position of the intermediate and final images, and show calculations of the corresponding distances measured from the origin. Assume the optical system is along the x-axis and take x = 0, as the position of the first converging lens.

b) Find the total magnification of the two lens system.

c) If the height of the object is 25 cm, find the height of the final image. Is the final image upright or inverted?

Explanation / Answer

intermediate image is at x=20 final image is at x= 140 magnification = 1.6 final image would be inverted

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